Governor for electric motors



Nov, 16, i937. J. A. FRIED GOVERNOR FOR ELECTRIC MOTORS Filed July 16, 1934 4 Sheets-Shee`t 1 /N VEN TOR.

Nov. 16, 1937.l J. A. FRIED 2,099,560

GOVERNOR FOR ELECTRIC MOTORS Fild July 1s, 1934 4 sheetssheet 2 Nov. 16, 1937. J. A. FRIED GOVERNOR FOR ELECTRIC MOTORS Filed July 1e, 1934 4 Sheets-Sheet C5 fm@ M y M /l Trae/wr Ks.

Nov. 16, 1937. J, A FRlED 2,099,560

GOVERNOR FOR ELECTRIC MOTORS Filed July 16, 1934 4 Sheets-Sheet 4 Patented Nov. 16, 1937 UNITED STATES PATENT OFFICE Wales Adding N. Y.

Machine Corporation, Ithaca,

Application July 16, 1934, Serial No. 735,324

14Claims.

This invention relates to governors for electric motors which will tend to keep the speed of said motors at a desired predetermined speed even though the voltage of the current supplied to the motor or the load may fluctuate. Such motors and governors are particularly usefulfor the operation of adding and calculating machines. Most governors function at high speeds and are not adapted to being attached directly to an adding machine; also they are not capable of being made to function at the particular part of a cycle at which control is desired.

An object oi' the invention is to provide an improved, simple, dependable and efiicient governor for controlling the speeds of electric motors.

Another object of the invention is to provide improved means for keeping the speed of the motor below a selected maximum, which may be employed with eitherr high or low speed motors; with which the motor speed at which the governor becomes eiectlve may be varied to s ome extent, and which is relatively simple, compact and inexpensive.

A further object oi' the invention is to provide an improved governor for electric motors which may be utilized to start and stop the motors as well as control its speed; which will start the motor automatically after the driven mechanism has been operated through a predetermined cycle; and which will be relatively simple and inexpensive.

Other objects and advantages will be apparent from the following description of an embodiment of the invention, and the novel features will be particularly pointed out hereinafter in the appended claims.

In the accompanying drawings:

Fig. 1 is a side elevation of a portion of a frame I of an adding machine of the electrically operated type to which the governor has been applied, with parts not directly related to the governor and its operation omitted in the interest of clarity, and with the parts in normal inactive positions.

Fig. 2 is a similar elevation but with the governor in a different operative position.

Fig. 3 is a similar elevation of the same with the governor in an intermediate position under conditions in which it is effective to check the speed of the motor.

Fig. 4 is an end elevation of the same with the parts in the positions shown in Fig. 1.

Fig. 5 is an end elevation similar to Fig. 4, but with some of the parts removed, and the remaining parts shown on a larger scale, in order to (Cl. 20G-52) illustrate important parts of the improved governor.

Fig. 6 is a perspective of the operating element forming a part oi' the governor.

Fig.-7 is a perspective of the inertia 'element 5 forming part of the governor.

Fig. 8 is a side elevation of the inertia and operating elements shown in Figs. 6 and 7, but viewed from the opposite side from that shown in Fig. 1.

Fig. 9 is a perspective of the eccentric pin, by the rotation oi' which the minimum speed at which the governor becomes eiective, may be changed.

Fig. 10 is a side elevation of a portion of the motor, and the cycle controlling mechanism for the motor, together with a wiring diagram to illustrate the electrical details by which the operation of the motor is controlled.

Fig. 11 is a sectional elevation of the mounting o ior the inertia and operating elements oi' the governor, the section being taken approximately along the line iI-I I, Fig. 1.

Fig. 12 is another sectional elevation through the mounting of the operating element, the sec- 25 tion being taken approximately along the line I2-I2, Fig. 11.

Fig. 13 is a sectional elevation through the contact mounting means of the inertia element, the section being taken approximately along the line il-Il, Fig. 5.

Fig. 14 is a sectional elevation through a part of a calculating machine and illustrating mechanism that may be employed to initiate an operation of the motor.

Fig. 15 is a sectional elevation, somewhat similar to Fig. 1, of a part of a calculating machine also constructed in accordance with the invention but illustrating another embodiment thereof, in

which the governor also acts as the main switch,

the mechanism shown in Figs. 14 and 15 being connected together in use.

Fig. 16 is a sectional elevation of a part of the mechanism shown in Fig. 15 with the parts shown in the positions taken at the moment oi' tripping in order to start an operation of the motor.

Fig. 17 is a similar elevation showing the position oi' the parts during the operation oi' the motor.

In the embodiment of the invention illustrated in Figs. 1 to 13, the improved governor has been applied to the electric drive of an adding machine where the motor is given successive, usually intermittent operations o1' a definite cycle in 55 the manual type of adding machine. While the governor broadly is of general application and may be used for controlling motors in various other types of machines, it is particularly valuable when applied to calculating devices such as shown.

In the illustrated application of the governor to a calculating machine, in Figs. 1 to 13v the electric motor lil, Fig. 10, may be of any suitable size and type and is employed for operating the running in and printing mechanism that is usually operated by a hand crank, not shown, applied to the main shaft II, Figs. 1, 2 and 3.* This operating handle or hand crank applied to the shaft II, is brought forward and then released, whereupon a spring that was tensioned during the forward stroke of the handle, returns the handle to normal position. 'I'he electric motor lil functions to operate the shaft H in the same cycle of movement and for the same purpose.

The electric motor I is preferably of the high speed type and is geared through a reduction gear unit i2, Fig. 10 to a shaft I3 of a one-revolution clutch mechanism. This shaft i3 carries an arm i4 which is connected by a pin i5 to a iink i 6, which is also pivotally connected by a pin I1 to an arm i8 that is fixed on a rock shaft i9, suitably mounted for rocking in the frame 2li of the calculating machine. This shaft I9 extends across the calculating machine from side to side, and at the side of the machine opposite from the motor lili it carries an arm 2|, Figs. 1 to 13, fixed thereon. A link 22 is pivotally connected by pin 23 to the free end of arm 2|, and alsoby a pin 24 to the full stroke sector 25, which is fixed on shaft Il and by which the motion of the motor is communicated to the main shaft Il.

' For each cycle of movement of the motor I0, as controlled by the one revolution clutch mechanism, the arm I4 von the shaft I3 makes a complete revolution, and is then stopped by the one revolution clutch mechanism. During this one revolution, the arm i4 acts through the link I6 to rock the arm I8 and through it the shaft I9, and the latter rocks the arm 2l and through the link 22 oscillates the full stroke sector 25 and the shaft II. During this movement, the shaft I9 and arm 2i are rocked only through a. fractional part of a revolution, such as from the normal, retracted or inactive position shown in Fig. 1 to the extreme actuated position, shown in Fig. 2, the movement being in the direction of the arrow of Fig. 1.

A stud 26, Figs. 1 to 3. and 11, is secured in any desired manner. such as by the threaded shank 21 and nut 28, Fig. 11, to one of the side frame plates of the machine frame 20, and upon this stud I pivotally mount an operating element 29, shown separately in Fig. 6, and an inertia element 30, shown separately in Fig..'1. These elements 29 and 30 are free and separately rockable on the stud 26, with the operating element 29 in front of the inertia element 30, and each of these elements may have a bearing boss or sleeve through which the stud 26 passes in order to provide a stable and non-binding bearing. These elements 29 and 3|! may be spaced apart slightly by a spacer washer 3 I, the inertia element 3U may be spaced from the frame 2b by a washer 32, and a nut 33 and washer 34, provided on the outer end of the stud 26, serve to confine the elements 29 and 30 against removal from the stud 26.

The operating element 29 is provided with a laterally bent or struck out ange 35, Figs. 4 to 6, extending in a`direction normal to the plane of the oscillatory movement of the element. Immediately adjoining the flange 35, the element 29 is provided with a notch or aperture 36 for a purpose which will appear presently. The inertia element 30 is conveniently in the nature of a bell crank arm or lever, and the arm 36A thereof vis provided with an elongatecLslot 31 running endwise of the arm. A split weight 38 has its sections disposed against opposite faces of the arm 341A, and connected to one another and clamped to the arm 30A by a screw 39, which passes through the slot 31 and connects the two sections of the weight. The screw 39 serves to clamp the weight to the arm 30A in any of the different positions along that arm into which it may be moved after the screw has been loosened. The weight 38 has a groove extending therethrough at the slit which slidinglyilts the arm 39A to be guided thereby.

The other arm 30B of 'the bell crank forming the inertia element 39, extendsalong the rear ofthe operating element 29 and is provided with a laterally bent flange 40 which extends forwardly through the notch 36 in the operating element 29, as shown clearly in Fig. 5, into a. position immediately below. but facing, the fiange 35 on the element 29.

A contact 4I is provided onthe ange 40, Figs. and 13, and insulated therefrom. For this purpose, strips 42 and 43, Fig. 13, of insulating material are provided on opposite faces of the flange 40, and the contact 4| is riveted or welded to a metal conducting strip 44, which is secured flat against the upper face of the insulating strip 42, the strips 42, 43 and 44 being clamped or anchored to the flange 40 by rivets 45 which pass through all of these strips and through insulating bushings 46 that are set into apertures 41, Fig. 7, in the flange 40. The metal strip 44 extends rearwardly away from the flange 40, as shown in Fig. 4, and then towards the axis of oscillation of the inertia element 3'9, where it encircles the bearing boss of the inertia element to form a collecting ring 48, as shown in Fig. 11.

The ring 48 is insulatedfrom vthe bearing boss of the element 30 by shouldered rings 49 of insulating material. Similarly, a contact 50 depending from a metal conducting strip 5I, Fig. 5, is secured to the under face of the ange 35 and is insulated therefrom by insulating strips 52 disposed on opposite faces of flange 35, the strips 5| and 52 being attached to flange 35 by rivets 53 which are similar to the rivets 45, rivet bushings of insulating material and similar to bushings 46 being, of course, supplied in the openings 54 of the flange l35, before the strips 5I and 52 are applied to the flange 35.

The strip 5I to which the contact 50 is attached also extends toward the mounting stud 26 and there encircles the bearing boss of the operating element 29 to form a collecting ring 55, which is insulated from that bearing boss by shouldered rings 56 of insulating material and which are similar to the rings 49 which insulate the collecting ring 4B. Spring brushes 51 and 58 bear upon the collecting rings 48 and 55 respectively, and are both mounted upon a bracket 59, Figs. l to 4, the brushes being insulated from the bracket by strips 60 of insulating material disposed on opposite sides of faces of the free arm of the bracket. Rivets 9| pass through the strips 69, the bracket, and the brushes 51 and 59, the rivets being insulated from the bracket by insulating bushings in the same "manner as shown in Fig. 13 for the mounting of the strip 44.

With this arrangement a circuit through the switch contacts 4| and 59 from brushes 51 and 99 will be established in all the different angular or vibratory positions of the elements 29 and 99. The contacts 4| and 59 of the switch mechanism are held normally in contact with one another by a spring 62 which is connected at one end to a rearwardly extending lug 99 on the inertia element 99, and at its other end is attached to a rearwardly bent lug 94A of a lever 94, Figs. 1, 2, 3, 5 and 8, which is pivoted by pin 95 to the operating element 29. An eccentric pin or screw 66, Fig. 9, is carried by the operating element 29 to limit the movement of the lever 94 under the action of the spring 62. 'Ihe screw or pin 66, when rotated, will cam .the lever 94 in a direction to tension the spring 62, or will allow movement of levr 94 in the opposite direction to lessen the tension of spring 92, and thus will vary the resistance to separation of the contacts 4| and 59.

With the spring 92 acting between the elements 29 and- 99 and urging them relatively in directions to maintain the contacts 4| and 59 together, the elements 29 and 99 will normally move together as a unit when element 29 is vibrated or oscillated. A link 91 (Figs. 1 to 3) is pivotally connectedat one end to link 22, and at its other end to an aperture 91A in the operating element 29, by which the link 22 oscillates or vibrates the elements 29 and 99. During such oscillation or vibration of element 29, the inertia element 99 may lag behind the element 29 to some extent by inertia, as permitted by the notch or opening 39 in the operating element 29. The engagement of an abutment portion 29Aof the operating element 29 with the flange 49 of the inertia element, limits the degree or extent to which the inertia element 99 can lag behind the operating element 29 when the operating element is moving in a counter-clockwise direction, Figs. l to 3. Thus, if the element 29 is moved in a counter-clockwise direction too rapidly, the element 99 will, by inertia, lag behind and increase the tension of the spring 92, and momentarily separate the contacts 4| and 59, as shown in Fig. 3.

By changing the tension of the spring 92, through rotation of the eccentric pin 99, the resistance to separation of the .contacts may be increased so that the speed of the element 29 must be greater before the element 99 will lag behind and cause a separation of the contacts 4| and 59. By lessening the tension of spring 92, by rotation of the pin 99, the speed of the element 29 above which the element 99 lags and separates the contacts 4| and 59 will be decreased. Similarly, by adjusting the weight 99 to different extents away from the stud 29, the effect of its inertia may be varied, and the tendency of the element 99 to lag may be varied.

T'he circuit for the motor will next be described, with particular reference to Fig. 10. One terminal of the motor is connected by wire 69 to a terminal post 99, and the latter is connected by Wire' 19 to the brush 51 which bears on the collecting ring 49. From the collecting ring 49 the current may pass through the strip 44 to the Contact 4|. From the other and cooperating contact 59, the current passes through the conwill be rocked by finger 92 g v direction (Fig. 10) to carry the clutch tooth 99 4against the shaft 9|.

ducting strip 5| to the collecting ring 55, thence through the brush 59 and a wire 1| to a contact post 12. A second and adiacent contact post 19 is connected by wire 14 to a contact 15 of a main controlling switch, the other contact 16 of the same controlling switch being connected by wire 11 to the other terminal of the motor. 'I'he contact posts 12 and, have free portions extending in slightly spaced, parallel relation .to one another. so as to enter the openings of a well known type of detachable outlet plug 19, Fig. 1, to make contact therethrough to the power line.

The contact 19 (Fig. 10) of the main operating switch for the motor is normally urged away from the contact 19 to interrupt the circuit of the motor, and when operation of the motor is desired the contact 19 is engaged and flexed into closed circuit engagement with contact 15, by a roller 19, Fig. v10,- which is pivotally carried on the end of a bell crank or switch lever 99, which is fixed on a stud 9| that is rockably mounted in the frame. A stop finger 92 is also i'lxed on the stud 9|, so that the finger 92 and the bell crank or switch lever 99 move as a unit about the axis of the stud 9|. A spring 99 is connected to a depending tail portion 94 of the stop finger 92, so as to urge the stop nnger in a clockwise direction. Fig. 10, and carry its free end out .of lobstructing position with respect to a clutch dog 95, which is pivoted at 99 on a tail portion 91 of the arm |4.

A spring 99 is connected between the arm I4 and a tail of the clutch dog 95. for yieldingly urging the clutch dog in a direction to carry a clutch tooth or projection 99 thereof between adjacent teeth 99 of a ratchet wheel which is fixed on the shaft I9. When the clutch dog 95, in its rotation with the arm I4 about the shaft I9, engages against stop finger 92, the dog 95 in a counter-clockwise from the space between adjacent teeth 99, thus breaking the driving connection between the shaft I9 and the arm I4.

The bell crank or'switch lever 99 carries a pin 9|, and a trigger 92 is provided along one edge thereof with a slot or notch 99 which receives the pin 9|. The trigger 92 also has a tail 94 which abuts against, rocks upon and slides along the shaft 9|. A spring 99 is connected at one end to the elbow portion of the switch lever and at its other end to the trigger 92 at a point between the notch 99 and tail 94. This spring 95, which is normally under tension, urges the trigger 92 upwardly to abut the lower end of the notch 93 against the pin 9| and the tail 94 The outer or free end of the trigger 92 is provided with a latch pin 96, which is normally engaged in a notch 91, provided in the side edge of a depending latch lever 99 that is pivotally mounted on the rock shaft I9.

'I'he free end of the latch lever 99 is pivotally connected by a pin 99 to a latch lever link |99 which has a slotted end |9| slidably supported on a pin |92 carried by the switch lever 99. The link |99 also has a slot |99 extending vertically and at right angles to the slot |9I, and a tripping device |94 is engaged with the slot |99 for operating the link |99. The tripping device |94 extends to a suitable point on the key board (not shown)- of the calculating machine, so that when an operation of the motor is desired, the tripping device |94 is operated to pull the link |99 to the left in Fig. l0.

This movement oi.' link |00, which is permitted by the sliding engagement between the notch IIiI and the pin |02, swings the latch lever 98 to the left and releases the pin 96, whereupon the spring 83 rocks the stop nger 82 and the switch lever in a clock-wise direction, the trigger 92 moving as a unit with the switch lever 80. This carries the roller 19 against the spring contact 'I6 and exes the latter into switch closing engagement with the contact 15. When the stop nger 92 was moved in this manner, the clutch dog 85 was released and the spring 88 thereupon shifted the clutch dog tooth 89 into engagement with the teeth 90, which coupled the arm I4 to the shaft I3. The closing of the switch between the contacts 15 and 16 completes the circuit to the motor, and the motor begins to operate and through the gear reduction will rotate the arm I4 through one complete revolution. During that revolution, the arm I4 acts through the link I6 and arm I8 to rock the shaft I9 and cause a complete oscillation of the full stroke sector 25.

Concomitantly with this revolution, by mechanism which is not shown, but which forms the subject matter of another application, the pin 96 is elevated and relatched to the latchlever 9 8, just before the completion of a complete revolution of the arm I4. When the pin 96 is elevated and relatched in this manner, the trigger 92 is swung upwardly, and this trigger, through its action on the pin 9| and its fulcrum on the stud 8|, rocks the switch lever 80 in a direction toeievate the roller 19 and release the contact 16. This contact 16 then separates from the contact 'I5 and opens the circuit of the motor, but the stored energy of the motor and the parts driven thereby will drive it somewhat further to complete the rotation.

When the roller 'I9 was elevated in this manner by the movement of the switch lever 80, the stop linger 82, which moves as a unit with the switch lever y89, was rocked back into the path of the clutch dog 85, so that as the arm I4 completes its rotation, the clutch dog will be disengaged from the shaft I3, which disconnects the arm I4 from the shaft I3 and leaves the arm I4 in the same starting position, even though the motor might continue to move slightly further due to inertia.

When the shaft I9 is rocked by the operation of the motor it imparts two complete vibrations to the operating element 29, and if the motor is operating at a speed above the desired speed for which the machine was set, the lag oi. the inertia element 3B opens the circuit of the motor momentarily at the contacts 4I and 50, as shown in Fig. 3, usually but once during the forward stroke of the full stroke sector 25, and usually but once during the return movement of the full stroke sector 25, provided the speed of the motor has not decreased sufficiently owing to the separation of contacts HI and 50 during the forward stroke of sector 25. Thus the motor circuit will be opened one or more times during each cycle of operation ofthe driving mechanism, and the duration of each opening of the circuit, by the lag of the inertia element, will depend upon the inertia force which retards the movement of the element 3D with the operating element 29, it being understood that the spring G2 causes re-engagement of the contacts 4I and 50 as soon-as the lagging force decreases sufficiently. If the motor attempts to operate the machine excessively fast, the motion of the governor is so violent that a ilutter of the switch mechanism is set up which produces more than the normal single opening for yeach cycle of the governor.

The link 61 (Figs. 1 to 3) and the link 22 form a toggle or dead center connection between the arm 2| and theroperating element 29, and this toggle connection passes through dead center at v each operation. The normal position of the link 61 is shown in Fig. 1, and when the motor operates, the arm 2| and link 22 are moved to the left, Figs. 1 to 3. As the pivotal connection between the links 61 and 22 moves to the left, the connection between the links 61 and the element 29 will be pushed upwardly to elevate element 29. Such an intermediate position of link 61 is shown in Fig. 3, but as the movement of link 22 continues into the extreme position shown in Fig. 2, the pivotal connection between the links 61 and 22 will then tend to pull the link 61 downwardly. This may pull the operating element 29 slightly further in the downward direction than the position shown in Fig. 1, because the link 22 has moved downwardly to some extent while moving to the left in the drawings. Thus, during each forward rocking movement of the arm 2|, the operating element 29 is rocked counter-clockwise and then returned approximately to normal position.

When the arm 2| and link 22 move to the right during the return movement of the full stroke sector 25, the link 51 will be elevated endwise into the intermediate position shown in Fig. 3, and then returned to the normal position shown in Fig. 1, during which the operating element 29 will again be given a complete oscillation. With this arrangement the operating element 29 and the inertia element 30 will be given two complete oscillations for each single complete oscillation of the arm 2|, or for each cycle of operation of the motor. Two such complete oscillations of the operating element 29 and inertia element 30 for each cycles of operation of the motor of an adding machine have been found sufiicient to effect adequate control of the motor speed, but it will be understood that the link 51 may be connected to any moving part of the mechanism.

The speed of that moving part of the mechanism may be stepped up or geared up to cause more vibrations of the elements 29 and 39 forming the inertia switch, per cycle of operation for the motor, if the two complete oscillations of the inertia switch are not sufficient to control the motor speed adequately. When the invention is utilized for controlling the speed of motors driving other mechanisms, it is merely necessary to provide suitable mechanism such as a crank for vibrating the operating element 29 any desired number of times for a given extent of movement of the motor. 'Ihe action of the link 61 is very much like the action of the connecting rod or link of a crank mechanism and, of course, may be connected by crank mechanism to any mechanism driven by the motor.

The operation of this improved governor should be clear from the foregoing description, but will be briefly summarized. The motor is set in operation by the tripping device |09 which releases the trigger 92, whereupon roller i9 forces the contact 'i5 into engagement with contact 'I5 and starts the motor in operation. At the same time the stop nger 'I2 releases the clutch dog 85, and the shaft I3 driven by the motor is then coupled to the arm I 4. The arm iii is then given a complete rotation and in doing so it rocks the shaft I9 and the arm 2| from the position 2,099,560 shown in Fig. 1 to the position shown in Fig. 2,`

' during which movement the elements 29 and 30 are given a complete oscillation. All of this occurs during one part oi' a revolution of the arm Il, and during the remaining part revolution the shaft Il and arm 2| are returned from the Fig. 2 to the Fig. 1 position, during which the elements 23 and 33 oi' the governor mechanism will be given another complete oscillation or vibration.

Just prior to the completion of the rotation of arm Il, the trigger pin 90 is relatched, and the circuit oi' the motor opened at contacts 15 and 16, the stop linger 32 being concomitantly returned to a position in which it obstructs travel of the clutch dog l5 which is moving clockwise` with arm I4 in Fig. 10, and when this obstruction occms, the arm Il is uncoupled from the shaft I3 and the parts remain in the positions shown in Figs. 1 to 3, and 10, even though the motor may continue to operate slightly further by inertia. If the speed oi' the motor is too great during the above described operation, the inertia element 3l will lag behind the element 2l and momentarily open the circuit oi'` the motor at contacts 4| and Il, as shown in Fig. 3, and this opening ot the circuit o! the motor temporarily slows down the motor speed.

The separation of contacts Il and 5l is 'only momentary because the spring 02 soon brings the contacts 4| and 5l again into engagement with one another, and during the vibration of elements 2 3 and 33 ln the opposite direction, there can be no separation oi' the contacts Il and 5l due to any lag of the element 3l, because the drive between the elements 29 and 3l in that direction is unyieldlng. This interruption o! the current of the motor at contacts Il and 5l will also occur during the second vibration of the elements 29 and 33 for each cycle of operation of the operating mechanism if the momentary interruption of th'e current during the rst vibration of that cycle does not decrease the speed of the motor suiilciently.

Referring next to Pigs. 14 to 17, the mechanismshowninPlg. 15isdispodattheright of the mechanism shown ln Pig. 14, and con-.

nected thereto in a manner which will be explained presently, to illustrate a modliication of the invention in which the governor is also utilizedasastartandstopswitchfortheelectrlc motor. In this modication of the invention. and referring ilrst to 111g. 14, the calculating machine is provided with a touch bar Ill which lsmountedonastemwlthatreciprocatesinan aperture |I1lnahous|ng |33 iolrthecalculatlng mechanism. 'Ihestem |I3,atitslowerorinner end,isprovidedwlthanel0ntedalot|llwhich receives a stud Ill carried by the housing |33. 'Ihe -stem I, at a point between the slot |32 andthetouchbarldsconnectedbyapivotpin |||toalever||2wh|ch,lnturn,ispivotedat I|3tothehousing |33.

Thelever ||2 andthestudllltogetheri'orm meansforsupportimthestmnofthetouchbar andguldingitinitsrecipmtionsormovements to the extent permitted by the slot III. The lever||2 is provided with a lug orarm lilwhichagalnstastud IIS carriedbyalever Illthatlspivotedbyastud ||1 on the frame 23 oi' thecalculating mechanism. Asprlng lllisconnectedbetweenthe lever III andasuitablepartotthetrame 23so astourgetheleverlllupwardlyandthmugh thestudlllandlever||2,elevatethetouchbar |05 to the position shown in Fig. 14. When the touch bar |05 is depressed, it will tension the spring Ill and rock the lever I6 in a. manner to initiate the operation of the motor, which will now be described.

'I'he trip rod |04 oi' Fig. l0, which controls the clutch, is connected to a depending lug or arm |I9 (Fig. 4) ofthe lever IIS, so that when the touch bar |05 (Fig. 14) is depressed, the trip rod |04 will be operated to release the stop finger 32 (Fig. 10) and thus permit an operation of the spring 0B to engage the clutch dog 85 and the clutch ratchet wheel teeth 90. In this modlication, the switch mechanism 15-16 shown in Fig. 10 is omitted and the latch lever 9| utilized to control only the stop finger 32 of the clutch. In place of the switch parts 15, 16, the governor is utilized for the complete control of the motor, and for this purpose the governor is constructed and operated as explained in connection with Figs. l to 13, except that the inertia lever 33 is provided with an edge abutment |23, Fig. 15, by which the inertia lever 3l may be forcibly operated or controlled in order to start and stop the motor. 'lhe governor parts are designated by the same reference characters in mg. l5 as are employed in Figs. 1 to 13.

A switch control lever |2| is pivotedat |22 to a suitable bracket |23 of the frame 2l, and is provided with a nose |24 at its free end which is engageable against the abutment |23 on the inertia lever 33. A spring |25 is connected between the lever |2| and a suitable stud |26 on the frame 2l of the calculating mechanism, so as to urge the lever |2I in a direction away from the abutment |23, until stopped by a stud |21, also carried by the frame 23 of the calculating mechanism. A trigger |23 is pivoted by a pin |29 to the lever l2| at approximately the point where the lever I2| crosses the link 22 that connects the rear shaft arm 2| with the full stroke sector 25. Ihe link 22, however, in this embodiment of the invention is provided with a trigger stud |30 which projects into the path of movement of the trigger |23. l

A spring |3I is connected between the free end of the trigger |23 and a suitable part of the lever |2| so as to urge the trigger |23 edgewise against the stud |33, but when the stud |33 is moved out of the path of the trigger |23 by its travel with the link 22, the movement of the trigger |23, under the action of the spring |3|, is limited by a suitable stud |32 that also is carried by the lever |2|. The trigger |23 ls also provided with a trip stud |33,andthisstmi I33isbeneatha laterally extending ange |34 on a trip lever |35 whichispivotedonastud |33onthebracket |23.

'Ihetriplever lisoonnectedbyalink |31 tothe depending armor lug ||3 ofthelever lli, sothatwhenthetouchbarlisdepreedthe link Illwlllnotonlyreleasetheclutchtocause acouplingoi'themotortothecalculatingmechanism,butthroughthelink |31,thetrlplever l3iwillbemckedinaclockwisedirectiomligs. 15-17, into the position shown in Fig. 16, during which its flange lufoperates the trip stud |33 andthroughit tbetrigger |23 lntothe positlonshowninl'ig. 16. 'nilscarrlesashoulder |33 of the trigger out of ent with the stud |3lonthelink22. 'lhespringlthen tacts motor.

nested between the trip lever |35 and a suitable anchorage point, such as the pivot pin |22, on which the lever 2| is mounted, and this spring |39 urges the lever |35 in a direction to elevate the flange |34 and release the trigger |23.

When the switch contacts 4| and 50 are engaged, the motor begins to operate, and through the clutch, operates the link 22 in the manner explained in connection with Figs. 1 to 13, which would be to the left in Fig. 15. This would carry the pin |30 to the left and away from the trigger |28, as shown in Fig. 17, and the stud |32 on the lever |2| limits the movement of the trigger |23 under the action of its spring |3|, the parts assuming the positions shownvin Fig. 17. .As the link |22 returns to its normal position, shown in Fig. 15, which would be at approximately the end of a predetermined cycle of operation, the trigger s tud |30 thereon will engage against the shoulder |38 of the trigger |28 and push the trigger to the right in Figs. 15-17, which will force the lever |2| to the right, and through the nose |24 thereon will rock the inertia switch lever 30 in a direction to shift the contact 4| away from the contact 50 and open the circuit of the motor, thereby stopping the operation of the motor. 'I'he clutch is simultaneously opened by the stop nger in the manner explained in connection with Figs. 1 to 13.

In the operation of the modiiication of the invention shown in Figs. 14 to 17, a person'desiring to initiate an operation oi the mechanism. depresses the touch bar |05 and then releases it. When the bar |05 is depressed. it operates the lever H6 and through the link |04 causes an engagement of the clutch, and through the link |31 releases the trigger |28 from the stud |30 on the link 22.' When the trigger |23 is released from the stud |30, the spring |25 operates the lever |2| into a position against the stud |21, which is the position shown in Fig. 17.' When this occurs, the lever 30 of the governor is released, whereupon the spring 62 moves the lever 33 in a direction to engage the contact 4I with the contact 53, thus completing the circuit of the motor.

The motor thus operates and through the clutch drives the calculating mechanism and shifts the link 22 carrying the trigger stud |30 away from the trigger |28, as shown in Fig. 17. The link 22 is moved in an approximately endwise direction to the left in Fig. 15, and then is returned to the position shown in Fig. 15, which completes the desired cycle oi operation for the motor and the mechanism driven thereby. When the touch bar |05 is released, the springs ||3 and |33 return the touch bar to its elevated position and the trip lever |35 to the normal position shown in Figs. 15 and 17. When the ilange |34 of lever |35 is elevated, the spring |3| elevates the trigger |23 until limited by the stud |30 of the link 22, by the stud |32 on the lever |2|, or by engagement of the stud |33 with the ilange |34.

When the stud |30 moves with the link 22, to the left in Fig. l5, the trigger |23 is limited in its upward movement only by the stud |32 or the flange |34, and hence the trigger |23 will be held in (the position shown in Fig. 17, in which the shoulder |38 is in the path' of travel of the stud |30 on the link 22. Just before the stud |33 completes its return movement to the position shown in Fig. 15, it will engage the yshoulder |38 and push the trigger |23, and through it the lever I2 I, in a direction to separate the contacts 4| and 50 and open the circuit of the motor, which position of the parts is shown in Fig. 15.

It will be understood thatthe illustration and description of the invention as applied to adding machines is only for the purpose of disclosing and illustrating one embodiment of the invention in which it has particular value and usefulness, and that the invention may be applied to the operation oi other machines as well. within the board principles oi.' the invention.

It will also be understood that various changes in the details and arrangements oi parts which have been herein described and illustratedA in order to explain the nature of the invention may be made by those skilled in the art within the principle and scope of the invention as expressed in the appended claims.

1. A governor for an electric motor with an electric operating circuit comprising, a mechanlsm adapted to be driven by said motor in a given cycle, an operating element, means connecting said mechanism to said element for oscillating said element about a iixed axis, a plurality of cycles for each cycle of operation of said mechanism, an inertia element mounted for oscillation solely about the same iixed axis and separately of said operating element in a path approximately parallel to that lof said operating element, resilient means connecting said inertia 4elementto said operating element and urging said inertia element about said axis into contact vwith said operating element for normal oscillation therewith about saidl ilxed axis, but with said inertia element i'ree to lag when its inertia is sumcient to overcome the tension of said resilient means, and switch means connected to said elements' and operable automatically to open position upon a lagging of said inertia element upon said fixed axis, whereby when said switch means is connected in series with said motor in said circuit, a lagging of said inertia element on said axis will cause a decrease in the speed oi' said motor. k

2. A governor for an electric motor with an electric operating circuit comprising, a mechanism adapted to be driven by said motor in a given cycle, a pivoted operating element, an inertia element pivoted for rotation solely about approximately the pivotal axis of said operating element, a motion multiplying connection between said operating element and said mechanism operable for vibrating said operating element on said axis, a plurality of cycles for each cycle of operation of said mechanism, switch members, each mounted on one element and facingthe member on the other element, a spring connecting said elements and urging them about said axis in directions to bring the switch members into contact with one another and 'cause normal vibration of said inertia element with said operating element as a unit, and said inertia element being free to lag on said axis against the tension oi said spring and separate said members when said operating element is moving in one direction,'whereby when said necting said elements and operable to urge them in a direction to urge said contacts resiliently into engagement with one another, mechanism adapted to be operated by said motor and including a member moved to and i'ro at each operation of said mechanism, link means connecting said memberto-said operating element for vibrating it, a plurality of cycles for each cycle of movement of said member, whereby when said circuit for said motor includes said contacts in series therewith, the separation of said contacts will open the circuit of said motor, the lag of said inertia element in one direction when the speed of the motor exceeds a selected speed automatically causing a momentary separation of said contacts and a slowing down of said motor.

4. A governor for an electric motor with an electric operating circuit comprising, an operating element pivoted for oscillation, an inertia element also mounted for oscillation about approximately the axis of oscillation oi' said operating element, a'contact carried by each oi.' said elements and engageable with the contact carried by the other of said elements, a spring connecting said elements and operable to urge them in a direction to urge said contacts resiliently into engagement with one another, mechanism adapted to be operated by said motor and including a member moved to and fro at each Ioperation ofssaid mechanism, link means connecting said member to said operating element and passing through a dead-center position during movement in each direction oi' said member to impart to said operating element a multiple number of movements lor each movement of said member, whereby when said circuit for said motor includes said contacts in series therewith, the separation of said contacts will open the circuit of said motor, the lag of said inertia element in one direction when the speed of the motor exceeds a selected speed automatically causing a momentary separation of said contacts and a slowing down oi said motor, said operating element having an abutment portion normally spaced from, but engageable with the inertia element to limit the degree of lag of said inertia element.

5. In a governor for an electric motor with an electric operating circuit, the combination of,"

mechanism adapted to be driven by said motor in a desired cycle and including an arm rocked thereby, a second arm pivoted on an axis parallel to the first arm and spaced therefrom, a link connecting said arms so as to cause concomitant operation of said arms, an operating element and an inertia element mounted for pivotal movement about substantially the same axis but independently oi one another, a link pivotally connecting said operating element and said iirst mentioned link and forming with said iirst link and said operating element a toggle connection moving substantially through dead center position at each movement of the rst link, whereby for each cycle of movement of said arms said operating element will be given two complete vibrations, a pair of switch contacts, one carried by each of said elements and engageable with one another upon the relative movement of said elemits in one direction, a spring connecting said elements and urging them in a relative direction to bring said contacts into engagement with one another and couple said elements yieldingly together for normal vibration as a unit, whereby when said circuit for said motor includes said contacts the separation oi' the contacts opens the circuit of the motor, and the speed of the motor exceeds a selected speed, the inertia element will lagl behindthe operating element, when said elements are being operated in one direction, and separate said contacts momentarily to check the speed of said motor.

6. A governor for an electric motor with an electric operating circuit comprising, an operating element and an inertia element mounted for pivotal movement about approximately the same axis separately from one another, said elements having lateral flanges facing one another and approximately normal to the plane of oscillation of said elements, a switch contact carried by each of said anges on the side facing the other flange so that the contacts may eng`age when said elements are rocked in a direction to cause approach of said flanges, a spring connecting said elements and urging them in a relative direction to cause engagement of said contacts, and yieldingly and resiliently opposing separation of the contacts, mechanism adapted to be driven by said motor and connected to said operating element to vibrate the same whereby when said circuit for said motor is connected to said contacts in the diil'erent rocking movements of said elements, the separation of said contacts will cause a change in the speed oi' said motor, and whenever the speed of operation of said motor exceeds a selected speed, the lag of said inertia element will cause a separation of said contacts momentarily and a decrease in the speed of said motor.

7. A governor for an electric motor with an electric operating circuit comprising, an operating element and an inertia element mounted for pivotal movement about approximately the same axis separately from one another, said elements having lateral iianges facing one another and approximately normal to the plane of oscillation of said elements, a switch contact carried by each oi said flanges on the side facing the other flange so that the contacts may engage when said elements are rocked in a direction to cause approach of said flanges, a spring connecting said elements and urging them in a relative direction to cause engagement of said contacts, and yieldingly and resiliently opposing separation of the contacts, mechanism adapted to he driven by said motor and connected to said operating element to vibrate the same, whereby if said contacts are connected in series with said motor in said circuit, then whenever the speed of operation of said motor exceeds a selected speed, the lag oi said inertia element will cause `a separation of said contacts momentarily and a decrease in the speed of said motor, said operating element having an abutment engageable with the inertia element and limiting the extent of lag oi the inertia element to a desired extent.

8. A governor for an electric motor with an electric operating circuit comprising, an operating element and an inertia element mounted for pivotal movement about approximately the same axis separately from one another, said elements having lateral flanges facing one another and approximately normal to the piane of oscillation of said elements, a switch contact carried by each of said anges on the side facing the other iiange.

so that the contacts may engage when said elements are rocked in a direction to cause approach oi' said anges, a spring connecting said elements and urging them in a relative direction to cause engagement of said contacts, and yieldingly and resiliently opposing separation of the contacts, mechanism adapted to be driven by said motor and connected to said operating element to vibrate the same, whereby if said contacts are connected in series with said motor in said circuit, then whenever the speed of operation oi said motor exceeds a selected speed, the lag of `said inertia element will cause a separation of said contacts momentarily and a decrease in the speed of said motor, one of said elements having an arm pivoted thereto and connected to said spring at a substantial distance from said pivot to form the connection between said spring and that element, said one of the elements also having an eccentric pin rotatable thereon and engageable with said arm to cam it in a direction to vary the tension of said spring and thereby modify the speed of the motor at which the inertia element lags sufficiently to cause a separation of the contacts.

9. A governor for an electric motor with an electric operating circuit comprising, mechanism adapted to be driven by said motor, switch means driven by said mechanism and having resiliently connected switch parts moved relatively to one another automatically by inertia lag of one of said parts behind the other when the speed of operation exceeds a selected speed, whereby when said switch parts are connected in series with said motor in said circuit, the speed of said motor will be controlled by said inertia lag, and means operable by said mechanism automatically at the end of a predetermined cycle of operation for forcibly causing relative movement of said switch parts in a direction to separate them.

l0. A governor for an electric motor with a controlling circuit, comprising mechanism adapted to be driven by said motor, a leading switch part moved to and fro by said mechanism and having a slot therein, a trailing switch part also mounwd to move to and iro in the same direction and having a portion disposed in the slot of said leading part, and having lost` motion in said slot in the direction of movement oi" said parts and resilient means for causing said trailing switch part to follow the leading part in one direction and maintain said parts normally in contact, but yielding upon separation ci said parts by inertia lag of said another part behind the rst part whenever the speed oi said rst part exceeds a selected speed, said switch parts being adapted to control said circuit and through it said motor, whereby the separation of said parts will decrease the speed oij the motor.

ll. A speed governor i'or a machine having an electric circuit controlling its speed which comprises mechanism adapted tp be driven from said machine and including a member movable to and fro in timed relation to said machine, an inertia switch having a leading switch part and a trailing switch part moving in parallel paths and connected by resilient means urging said parts into contact with one another when moving in one direction, but yielding upon separation oi the parts by inertia lag of the trailing part behind the leading'part whenever the speed of the leading part exceeds a selected speed, a contact on each of said parts in position to engage the contact of the other of said parts when said parts are caused to engage one another by said resilient means and separated when engagement between said parts is broken by inertia lag, link means connecting said member to said leading switch part for operating the latter and passing through dead center position at each movement in either direction oi' said member, whereby said leading part will be operated through a complete cycle of movement in opposite directions at each operation of said member in one direction, and circuit connections to each of said contacts, whereby when said circuit connections are included in series in said electric controlling circuit, said switch contacts Will control the speed of said machine which operates them.

12. A governor for controlling the speed of a machine through the control of an electric circuit, which comprises a member driven by said machine, a link operated endwise in opposite directions by said member, a pair of elements mounted for movement in approximately parallel paths, a second link pivoted to one of said elements and to said rst link and operating that element to which it is connected Whenever said iirst link is given endwise movement, said second link having a toggle-like relation to said first link and the element to which it is connected, whereby whenever said first link moves in either endwise direction, said second link will move through dead center position and thus cause a to and fro movement of said member to which it is connected for each of said endwise movements or said rst link, resilient means connecting said elements for causing the other of said elements to trail said first element to which .the second link is connected when moving in one direction, and switch means for said control circuit operated by engagement of said elements under the action of said resilient means, whereby whenever said operating element moves in one direction at a speed above a selected speed, the inertia lag of said second element will overcome the stress of said resilient means and cause an operation of 'said switch means to decrease the speed of said machine.

13. In a speed governor, a pair oi elements pivcted for osclllatlon'lndependently of one another about the same axis, one of saidelernents being a leading element and having a slot therein, means connected to that leading element for oscillating it, the other of said elements being an inertia element and having a portion received in said slot and movable therein in the direction oi? oscillation to a substantial extent, a contact carried by said leading element, a second contact carried by said inertia elementand engageable with the rlrst contact when said inertia element moves in said slot in one direction, a spring con necting said elements and urging said inertia element in said slot in a direction to engage said contacts, circuit connections to said contacts throughout the oscillatory movements of said elements, whereby when` said leading element is oscillated, said inertia element will move with it, with said contacts in engagement, until the speed of oscillation exceeds a predetermined speed, whereupon the inertia lag of said inertia element, while said elements are moving in said one direction, will overcome the action in said spring and cause a momentary separation of saidcontacts.

14. In a speed governor, a pair oi elements pivoted for oscillation independently of one another about the same axis, one of said elements being a leading element and having a slot therein, means connected to that leading element for oscillating it, the other of said elements being an inertia element and having a portion received in said slot and movable therein in the direction of oscillation to a substantial extent, a contact carried by said leading element. a second contact carried by said inertia element and engageable with the rst contact when said inertia element moves in said slot in one direction, a spring connecting said elements and urging said inertia element in said slot n a direction to engage said contacts, circuit connections to said contacts throughout the oscillatory movements of said elements, whereby when said leading element is oscillated, said inertia element will move with it, with said contacts in engagement. until the speed of oscillation exceeds a predetermined speed, whereupon the inertia lag of said inertia element, while said elements are moving in said one direction, will overcome the action in said spring and cause a momentary separation of said contacts, said inertia element having a weight adjustable thereon to diierent distances from said axis of oscillation, whereby the speed at which the lag causes the operation of said contacts, may be adjusted to some extent.

JEROMEAFRJED. 

